Steam-valve.



C. REEVES.

STEAM VALVE.

APPLICATION Flu-:o MAR. 1s. 1915.

1 ,271,938. Patened July 9, 1918.

A TTRNE V8 nNrrED srarEs Parana onirica y CLIFTQN REEVES, or TRENTQN, JERSEY, i

sTEAivr-VAL'VE.

,l Specification of Letters Patent. l PtielttlvJl'llyQ, 19x18.

Application ledMalch 13, 1915.4 Serial No, 14051.V

To all whom may concern.'

ABe it known that I, CLiEroNV REEVES, of rIrenton, in the county' of Mercer and in the State of New Jersey, have invented a' certainnew and useful Improvement in Steam- Valves, and do herebydeclare that the following is a full, clear, andy exact description thereof. l 1

My invention relates particularly to valves designed to be appliedftc steam engines.

The yobject of my invention is to provide a -steam valve in which the valve ring on the piston valve is constantly maintained against its seat by the use of the elasticity of the valve ring,/also through the aid. of pressure exerted by the steam itself. lAnother object of my invention is to provide a construction of this character in lwhich the parts are few in number' and thegform of construction simple so that there will not be a large number of parts to yget out of order, and so that any repairs or replacements can be readily made. Another ob# jectof my invention is to provide a construction of this kind in which the parts of the valve ring cannot wear therbridge faster than the main body of 4the'sleeve, which is arranged to receivefa piston valve.

Whilermy invention is capable of embodiment in many different forms,'for the purpose of illustration I have shown only one:

form thereof in the accompanying drawings, in which,

Figure 1 is a vertical section of a steam engine equipped with my valve; and

Fig. 2 is a vertical section of my piston valve.

In the drawings I have shown a steam cylinder 1, having a piston 2 therein, said steam cylinder having cylinder heads 3 and 4. The cylinder 1 is furthermore provided with a valve chamber 5, which communicates with the cylinder 1 by means of ports 6 and 7. The ports 6 and 7 are arranged to communicate with openings 8 and 9 in sleeves 10 and 11, which are contained in the valve chamber 5, and which are arranged to receive a piston valve 11a, having at its ends rods 12 and 13 adapted to be guided by heads 14 and 15 on the ends of the valve chamber. In each. of the sleeves 10 and 11, the openings 8 and 9 are arranged at intervals around the sleeves with bridge portions 10a separating the portions of the opening in the two sleeves. The reciprocation of the piston valve 11'@1 is so e'ected that steamis Vadmitted from the steam chamber 5 first to the port 6 and then to the port,7, so as to be conveyed ultimately to opposite ends of the cylinder-1.

When steami is being admitted tothe port' 6, the port 7V is in communication with the exhaust chamber 16, and when steam is being admitted to the port the port 6 in communication with the exhaust chamber 17. The piston valve 11:i is :provided opposite each'of'the ports 6 and 7 with a piston, each of which is comprised of two end members 18 and 19 having annular shoulders 20 and 21 to receive a ring 22. Each ofthe rings 22 is provided with annular recesses 23 and 24 to 'receive piston rings 25 and 26 and the pistonL rings 25 and 26 have recesses 27 and 28 to receive a central piston ring 29. A port 30 passes through each of the end members 19 to communicate with thelrecess 24 Vbeneath the piston ring k26. Further-` more, each of the central pistonvrings 29 has a port,y 31 to equalize theV pressure-'on opposite sides of said piston ring. In the operation of my invention the piston valve 11a is reciprocated inthe usual way, thus admitting steam rst to the port 6 and exhausting steam from thevport 7 and then admitting steam to the port 7 and exhausting steam from the port 6', so as to yreciprocate the piston 2. During the reciprocation 0f the piston valve 11a steam is admitted through the port 30, thus forcing the piston rings 26 outwardly against the sleeves 10 and 11, which cause the central piston ring 29 to be moved outwardly owing to the fact that the several piston rings on each of the pistons are interengaged with one another. The action of the steam in this manner is to greatly supplement the outward pressure produced by the elasticity of the rings themselves. If it were not for the central piston rings 29, the piston rings 25 and 26 would wear the bridge portions 10a faster than the main bodies of the sleeves 10 and 11, so that the rings 25 and 26 would finally catch in the bridge portions 10a and become broken. By the presence of the central piston rings 29, however, the more rapid wear of the bridge portions 10 is avoided, inasmuch as while the piston rings 26,' for example, are opposite the bridge portions 10a', the central piston rings 29 will be supported upon the body portions of the sleeves 10 and 11, thus preventing said bridge portions 10a from wearing faster than the body 6ol V y Copies ofV this patent may be obtained for five .cents each, addressing the Commissioner of Patents,.

portions of the sleeves 10 and 11. In the operation of the piston valve, should a sudden shot of Water enten the valveV chamber,

29 Will result also in a compres-sion of the rings25 and 26. f

While I have described my invention above in' detail, I- Wish it` to be understood 'that many changes may be madetherein Without departing'fromthe spirit of my invention.:

I. In'coinbination a piston valve compr-ising tWo siderings, laterally proj eeting shoulders on the adjacent sidesv of said-rings and a central valve seat engaging ring supported upon; said'shoulders to permit free outward movement of saidY central ring., and a valve seat comprising a' cylindrical sleeve having aperipheralport openingtherein, said central ringengaging; a fully portion; of said sleeve when either' of the siderings covers the port opening.

2. In vcomlo'natioifna pistonvalve having tvvo lside rings' recessed on their adjacent sides, a central valve seat engaging ring supportediin said,l recesses in such-a manner as to permit independent outvvardmovement of one 'of' the sidel rings relative tothe other, and a valve seat'comprising a cylindrical sleeve having a peripheral? port opening therein, said centrali ring engaging a' full portion of said sleeve When either of the side rings covers the port opening.

3". In combi-nation', a piston valve having tivo side rings recessed on their adjacent sides, 'a central Valve seat engaging ring supported in saidrecesses in such a manner as to permit independent outward movement of'v one ofA the side rings relative to the other, and a valve seat comprising a cylindrical sleeve having a peripheral port opening therein, said central ringy engaging a fu-ll portion of saidsleeve when either of theside rings covers the port opening, one Vof' said side rings being'previded with means for submitting the under surface thereof to the. direct action lof' the steam.

4. In combination, a piston valve having two side rings recessedy on their adjacent sides, acentral valve seat engaging ring supported; in said recessesin such a manner asto permit independent outwardmovement of one'ofy the side rings relative to the'other, and: a valve seat: comprisingV a; cylindrical sleeve: having aiperipheral' portopening therein, said central.v ring engagingA afull portion of said sleeve when .either of the side rings covers-the port opening, the central'Y ring being provided with a port to surface thereof.. f

Iii/testimony that I claiinrthe foregoing I have hereunto set. my hand. f i

v j i CLIF'IQN REEVES. yVV-itnesses: I i

LUTELnA-F. SNYDER, WM; Ii.` CiiisnnLiiif.`

Washington, D. C.

equalize the fpressureon the upper and loiven 

